Process of and apparatus for type casting and proof reading



Aug. 20, 1929. c. A. MACOMIC 1,

PRQCESS OF AND APPARATUS FOR TYPE CASTING AND PROOF READING 3 Sheets-Sheet 1 f/fU/i for.

' UaY/e/fl Maw/1Z6 PM on Gd);

Aug. 20, 1929. c. A. MACOMIC PROCESS OF AND APPARATUS FOR TYPE CASTING AND PROOF READING File May 6, 1925 3 Sheets-Sheet 2 IIIIIIIIL M w\ Aug. 20, 1929. c. A. MACOMIC PROCESS OF AND APPARATUS FOR TYPE CASTING AND PROOF READING Filed May 6, 1925 5 She'efts-Sheet 3 Pvt/bah Patented Aug 20, 1929.

UNITED STATES PATENT OFFICE.

CHESTER A. MACOMIC, OF CHICAGO, ILLINOIS, ASSIGNOR TO PATENT PRODUCTS COR- PORATION OF CHICAGO, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

ZPROCESS OF AND APPARATUS FOR TYPE CASTING AND PROOF READING.

Application filed May 6, 1925.

My invention relates to a process of type casting and for the means for carrying it out. It has for one object the provision of a process of and means for casting lines of type in response to the actuation of a typewriter key board. Other objects will appear from time to time in the course of the specification and claims.

My invention is illustrated more or less lo diagrammatically in the accompanying drawings, wherein:

Figure 1 is a vertical longitudinal section;

Figure 2 is a section along the line 2-2 of Figure 1 Figure 3 is a perspective view of a matrix strip;

Figure 4 is a bottom view of such a strip; Figure 5 is a horizontal section illustrating the alignment of the matrix strips with the controlling stops;

Figure 6 is a detail illustrating the engagement of the matrix strip with a controlling stop.

Like parts are indicated by like characters 2 throughout the specification and drawings.

A is any suitable typewriter mechanism having a lurality of type controlling keys A and a s lift key A. The keys are all situated upon the ends of vertically disposed flat strips A, as usual in typewriter practice. which strips pass through the slotted comb guide plate At A is any suitable adjusting means for adjusting the level of the type writer inrelation to the frame members B of the line of type'machine.

Adapted to be controlled by each key, as

the key is compressed is a key extension member 13 which extends to one arm of the bell cranklever B shown in dotted lines in Figure 1, and pivoted as at B To the opposite arm of the lever B is pivoted as at B a controlling wire B the opposite end of which is secured to'the upper edge B of a shutter B which is pivoted as at B and is provided with a downwardly turned lower edge B. It will be understood that there is a key extension member, a bell crank-lever, a wire and a shutter for each key of the typewriter, each shutter extending transversely from side to side of the typewriter across substantiaily the entire width of'th'e line of type casting machine.

Underlying the shutters is a plunger car- I riage C having mounted in it, for vertical moi'en'ient a plurality of plungers C each Serial No. 28,292.

having the relatively extended head C and a lower extension C of smaller cross section. It will be understood that the plunger carriage bears a plunger for each shutter.

I move the plunger carriage laterally in unison with the usual typewriter escapement carriage, by means the details of which form no part of the present invention. Thus the position of the plunger carriage corresponds with the position of that part of the escapement carriage which is to receive the next type impression, and, during the writing of a line of type on the typewriter, the plunger carriage travels laterally entirely across the bed of the machine.

Underlying the plunger carriage is a stop bed D in which are positioned for vertical movement a plurality of stops D The stop bed D is mounted for vertical movement for example on the shafts D which pass through the bearing members I) and may be moved vertically, to move the stop bed, by any suitable mechanism, the details of which are not herein shown as they form no part of the present invention. The stops in the stop bed are arranged in lines lying parallel with the plunger carriage. In each line there are two stops for each plunger of the plunger carriage. There are as many lines of stops as there are spaces to be filled, in the line of type to be produced.

Each plunger controls two stops, through the longitudinal movement of the plunger carriage C by means of the connecting link E which is controlled by the shaft key E of the typewriter and is pivoted to an arm of the bell crank lever E The op osite arm of the bell crank lever is secured y means of the wire E to the lever arm E which rotates the shaft E and through it the arm E which in turn longitudinally moves the plunger carriage C.

The stops D are depressed, through the shutters and the plungers C half of the stops of each line being aligned with the plungers when the shift key is in the normal position, the other half being aligned with the plungers. when the shift key is depressed. 4

In case the operator, seeing an error in proof which is typed by the normal typcwriter mechanism wishes to correct it, he draws the roller G to the right, as shown in Figure 1, the roller being actuated by any suitable belt or chain Gr which passes about the sheaves Gr G The roller pushes the stops up into the inoperative position, and the operator rewrites the line.

H is any suitable supporting bed or table having the upper supporting surface H Longitudinally slidable upon this surface are a plurality of matrix strips H the details of which are shown in Figures 3, 4 and 6. Each matrix strip has a flat under surface H which is penetrated by the vertically aligned symbols H each strip having aligned along it all the characters governed by or appearing on the keyboard used to operate the device. Preferably I arrange these-characters in pairs each adjacent pair being a pair of characters appearing on one of the typewriter keys.

At the forward end of each strip is an indentation H, the forward wall H of which serves as a spring abutment. The forward end is bevelled as at H At the rear of the strip is an upwardly projecting stop H which is forwardl continued along one side of the strip as at, I I.

J is any suitable spring finger the downwardly inclined end J of which is adapted to engage the spring abutment H. I do not illustrate in detail the means for drawing the spring finger J along the bed H but it will be understood that an suitable means may be provided for engagm it with the spring abutment H and for tiawing the matrix strip to the left as shown in Figure 1.

K illustrates the casting throat, a transverse slot extendin from side to side of the bed H and ada te to receive a charge of molten metal w ich may be fed in any suitable manner not here shown in detail.

L is a suitable transverse yoke overlyin the matrix strips and adapted to be clamped downwardly against them, for example by means of the spiral springs L in their housings L which are pressed between the bottom of the table H and the pins L on the shafts L, the shafts being secured to the ends L of the yoke L, and passing through the table H. The yoke L may normally be held in slightly raised position to permit free longitudinal movement of the matrix strips, for example through the links L which may be held in relatively raised position by any suitable means not herein shown. The metal pot from which the type metal is forced into the throat is diagrammatically shown as at L.

M is any suitable abutment arm which may be adjusted about the pivot M in the yoke L for example by the set of screws or bolts M M bearing against the arms M M M is an abutment strip bevelled as at M and adapted to engage one of the compressionstrips M between which the matrix strips may be compressed. M is the opposite abutment strip bevelled as at M and adapted to be engaged by the lower arm of the squeeze lever M which is pivoted as at M in the yoke L and has an upper arm M surrounding the vertical guiding bolt M held in normally raised position by the spiral compression spring M The use and operation of my invention are as follows:

I provide a type casting mechanism which may be operated by any suitable keyboard but which I prefer to operate by using an ordinary typewriter. The typewriter is po sitioned above or in front of the type casting mechanism and the positioning of the matrices of the type casting mechanism is governed by the keys of the typewriter keyboard. One outstanding advantage of this arrangement is that it is easy in proof reading. The operator writes a line on the typewriter, and can read that line on the paper in the usual way. When an entire line has been correctly written, a slug is cast which reproduces it.

I use a separate matrix strip for each available space in each slug. Thus if I cast slugs having the width of eighty letters, I employ a series of eighty matrix strips positioned side b side on a supporting bed. In the bot- 'tom 0 each matrix strip is the impression of every letter or character which can be printed. Thus by having matrix strips for each space on the slug, and by having all the characters on each matrix strip, I can position any character at any point on the slug.

In order to avail myself of the typewriter mechanism, I provide key extension'members, one of which is contacted by each key as the key is depressed in response to the pressure of the finger of the operator. Each such key extension member controls the movement of the matrix strip for the particular space along the line of type and along the slug which is being filled, when the key is depressed. In order to obtain this control I provide a transverse shutter or pressure transmitting member. which extends transversely across the entire bed of the machine.

Each shutter is pivoted and is controlled by a tension wire which in turn is secured to ,a bell crank lever, the opposite arm of which is controlled by the key extension member. Thus at each key depression a shutter is depressed.

Underlying the shutters is the plunger carriage which has thereon a plunger aligned with each shutter. This plunger carriage moves in unison with the movement of the typewriter escapement carriage, and always is aligned with the space on the slug which is being filled by the particular key pressure involved.

Positioned beneath the plunger carriage is a stop bed, in which are mounted rows of stops overlying each matrix strip. In each such alignment there are, with the Remington typewriter, for example, eighty three stops, two for each of the forty-two keys with the omission of one stop for one character, the underscore, which is not used in type casting. When a key is depressed it depresses a shutter, and the shutter depresses a plunger on the plunger carriage, and the plunger depresses a stop, the stops being frictionally mounted in the stop bed. In order to control all eighty-three stops with the forty-two plungers which correspond to the forty-two keys I employ a connection with the shift key of the typewriter which, in response to movement of that key, rotates a bell crank lever, the opposite arm of which is connected to the plunger carriage and moves it longitudinally. Each plunger having a relatively extended upper surface, the action of the shutters on the plungers is not affected by this longitudinal movement of the plunger carriage and the plungers. However, it does affect the alignment of each plunger with the stops positioned beneath it, and I am thus able to control, when using a singleshift typewriter key bar, two stops with each plunger.

When the operator has written an entire line, he has depressed stops at various points all the way across the matrix supporting bed. He first corrects the line, if correction is necessary, and he can do this by running a roller beneath the stops, which forces them back into inoperative position, he then writes the line over again. When'the proof is correct, the operator depresses the stop bed into such position that the stops are in longitudinal alignment with the upwardly projecting stops on the individual matrix strips. He thenpushes the operating lever and draws all the matrix strips forward in unison. Each strip is engaged at one end b a spring catch, which seats in a spring a utment. When the stop on each matrix strip engages the opposed stop on the stop bed, the matrix strip is arrested and the spring catch frees it. When all the matrix strips are released from the s rings they are all aligned with the desired c aracters overlying the castim point or throat. Where a space instead of a letter was used, a blank portion of the matrix strip will overlie the casting point. When the matrix strips are all aligned the operator clamps or squeezes them laterally together, in order to prevent irregularities or displacements and then operates the pump which forces in the molten metal which fills the narrow space beneath the matrix strips to form a slug. This space is defined or closed by laterally and ver tically movable elements, the details of Which are not of importance in the present application, but which can be moved to free the slug after it is cast and to permit it to be delivered to any suitable rack or conveying means. After each such casting operation the matrix strips are moved back to their original position ready for the writing of a new line of type.

While I have illustrated a device which may be and preferably is used with a typewriter, it will be obvious that I might obtain the same result with many varieties of keyboard and that I might, under some circumstances, depart from the use of a typewriter or its equivalent. However in practice it has proved advantageous to use a typewriter and to use ty ewriter paper as a positive check in proo reading, a check which is operative. before the slug is cast and which effects an enormous saving in time and in material. No line of type is cast until its proof has been read and corrected.

I claim:

1. The process of type casting from matrices, including the steps wherein the setting of theselecting means for the mat rices is responsive to the impression of a visual counterpart of the type to be cast, and wherein the final positioning of the matrices is made after the correction of the visual counterpart.

2. The process of casting type from a plurality of matrices each having a plurality of type impressions, which consists in preparing selecting means for the impressions and making a visual counterpart of the impressions, then proving the impressions by observation of the visual counterpart, then setting the matrices with the proved impression on each positioned in a casting zone, and positioning thereagainst the type forming material.

3. The process of casting type from a plurality of matrices each having a plurality of type impressions, which consists in preparing selecting means for the desired impressions successively in each line, making a visual counterpart of each impression as selected, proving the selection of the impression by observation of the counterpart, and,

after such proving, simultaneously casting the impressions of the line.

4. The process of casting type froma plurality of matrices each having a plurality of type impressions, which consists in succes sively selecting characters, proving the characters successively as selected, then moving the matrices to position corresponding impressions of each matrix in a casting zone, and simultaneously casting a plurality of corresponding printing characters.

5. The process of casting type from matrices which includes selecting in succession the desired printing characters and forming a visual counterpart of each character as it is selected, and at the same time ositioning control means for the corresponding matrix, and subsequently, after a plurality of such selections simultaneously moving a plurality of matrices, to position the characters so selected in a casting zone, and subsequently simultaneously casting the impressions so positioned.

6. The process of casting type from matrices which includes selecting in succession the desired characters and forming a visual counterpart of each character as it is selected, and at the same time positioning control means for the corresponding matrix, and subsequently, after a plurality of such selections, moving the matrices to position the impressions so selected in a casting zone, and subsequently casting the impressions so positioned.

7. The process of casting type from a plurality of matrices, each having a plurality of type impressions, which consists in successively selecting the characters to form a single line, proving the impressions of such characters successively as selected, subsequently moving the matrices to position the desired impressions in a casting zone, and simultaneously casting the impressions forming such line.

8. The process of casting type from a plurality of matrices, each having a plurality of type impressions, which consists in successively selecting the characters to form a single line, making a visual counterpart of each character as selected, proving the selection of the characters by observation of the counterpart, moving the matrices to position the desired impressions in a casting zone, and simultaneously casting the impressions forming such line.

9. In a type casting mechanism, a plurality of keys, a plurality of symbols upon each key, a plurality of shutters, one controlled by each key, a plurality of stops controlled by each shutter, a plurality of matrices adapted to be positioned by the stops, means for moving said matrices into position against said stops and means for positioning type forming material against the matrices.

10. In a type casting mechanism, a plurality of keys, a plurality of symbols upon each key, a plurality of shutters, one controlled by each key, a plurality of stops controlled by each shutter, a plurality of matrices adapted to be positioned by the stops, means for moving said matrices into position against said stops and means for positioning thereagainst the type forming material, a shift mechanism associated with said keys, and means, associated therewith, adapted relatively to move the stops and the shutters in response to actuation of said shift mechanism.

11. In a type casting mechanism, a typewriter key board, a plurality of symbols upon each key, a plurality of shutters, one controlled by each key, a plurality of stops controlled by each shutter, said-stops being arranged in pairs, a plurality of matrices adapted to be positioned by the stops, each said pair of stops being aligned with one of said matrices, means for moving said matrices into position against said stops and means for positioning thereagainst the type forming material, a typewriter shift mechanism associated with said keys, and shutter controlling means associated therewith and adapted to impart relative movement to said stops and shutters in response to actuation of said shift mechanism, one stop of each pair being of the key board, an impression receiving member, and means for supporting it in opposition thereto, means for moving saidm'atrices into position against said stops, and means for positioning type forming material against the matrices.

.13. In a type casting mechanism, a key board, a plurality of stops controlled thereby, a plurality of matrices adapted to be positioned by the stops, each of said matrices having formed thereon'a plurality of type impressions, a plurality of type bars adaptedto be actuated by the keys of said board, an impression receiving member and means for supporting it in opposition thereto, means for moving said matrices into position against said stops, means for positioning type forming material against the matrices, and means, independent of the key board, for moving the stops into inoperative position.

'14. In a type casting mechanism, a typewriterkey board, a plurality of shutters, one controlled by each key, a plurality of stops controlled by each shutter, said stops being arranged in pairs, a plurality of matrices adapted to be positioned by the stops, each said pair of stops being aligned with one of said matrices, each matrix having formed thereon a plurality of type impressions, means for moving said matrices into position against said stops and means for positioning thereagainst the type forming material, a plurality of type bars adapted to be controlled by the key board, an impression receiving member and means for supporting it y in opposition thereto, and means, independent of the key board, for moving the stops into inoperative position.

15. In a type casting mechanism, a typewriter key board, a plurality of shutters, one controlled by each key, a plurality of stops controlledby each shutter, said stops being arranged in pairs, a plurality of matrices adapted to be positioned by the stops, each said pair of stops being aligned with one of said matrices, each matrix having formed thereon a plurality of type impressions, means for moving said matrices into position against said stops and means for positioning thereagainst the type forming material, a pluralit of type bars adapted to be controlled y the key board, an 1mpress1on receiving member and means for supporting it in opposition thereto, and means, independent of the key board, for moving the stops into inoperative position, a typewriter shiftmechanism associated with said keys, and shutter controlling means associated therewith and adapted to impart relative movement to said stops and shutters in response to actuation of said shift mechanism, one stop of eachupair of stops being positioned to be controlled by the shutters when in normal osition and the other being positioned to be controlled by them when shifted.

16. In a type casting mechanism, a key board, a plurality of stops controlled by the key board, a plurality of matrices adapted to be positioned by the stops, each of said matrices having formed thereon a plurality of impressions, means for simultaneously moving a plurality of matrices into position against the stops, and means for positioning type forming material against the matrices.

17. In atype casting mechanism, a key board, a plurality of stops separate from and controlled by the key board, a plurality of matrices adapted to be positioned by the stops, each of said matrices having formed thereon a plurality of impressions, means for simultaneously moving a plurality of matrices into position against the stops, and means for positioning type forming material against the matrices, and supplemental control means for said stops, independent of said key board,-for returning said stops to inoperative position.

18. In a type casting mechanism, a key board, a plurality of stops controlled by the key board, a pluralit of matrices adapted to be positioned by t 1e stops, each of saidmatrices having formed thereon a plurality of impressions, means for simultaneously moving a plurality of matrices into position against the stops, and means for positioning type forming material against the matrices, and supplemental control means for said stops, in ependent ofsaid key board, for returning said stops to. inoperative position, comprising a roller and means for moving it along said stops.

19. In a type casting machine, a .ty ewriter adapted to write on a sheet, a stop ed separate from said typewriter containing a plurality of stops, means controlled by the typewriter for moving selected stops into working position. a plurality 'of matrix strips, means for .yieldingly moving them into engagement with said stops, a mold, one side of which is formed by said strips adapted to cast a type slug, means for distributing the matrix strips after the slug has been cast.

20. In a type casting machine, a typewriter adapted to write on a sheet, a stop bed separate from said typewriter containing a plurality of stops, means controlled by the typewriter for moving selected stops into working position, a plurality of matrix strips, means for yieldingly moving them into engagement with said stops, a mold, one side of which is formed by said strips adapted to .cast a type slug, means for distributing the matrix strips after the slug has been cast, the operation of the typewriter and stop bed being independent of the operation of the other parts after the matrix strips have been brought into engagement with the stops. p

:3 L In a type casting machine, a typewriter adapted to write on a sheet, a stop bed separate from said typewriter containing a plurality of stops, means controlled by the typewriter for moving selected stops into working position, a plurality of matrix strips, means for yieldingly moving them into engagement with said stops, a mold, one side of which is formed by said strips adapted to cast a type slug, means for distributing the matrix strips after the slug has been cast, the operation of the typewriter and stop bed being independent of the operation of the other parts after the matrix strips have been brought into engagement with the stops, the relation of the typewriter and stop bed being such that the operator may continue to write on the typewriter and set the stops for a succeeding casting operation while the first one is continuing.

22. In a type casting machine, a plurality of matrix members, a mold, means for selecting and positioning the members to form one side of the mold, a typewriter and a working connection between it and the selecting means whereby when the typewriter keys are depressed the typewriter will write proof and simultaneously control the selection of the matrix members and means for simultaneously casting a slug containing the impressions of the matrix members so selected and positioned. 1

23. In a type casting machine, a plurality of matrix members, a mold, means for selecting and positioning the members to form one side of the mold, a typewriter and a working connection between it and the selecting means whereby when the typewriter keys are depressed the typewriter will write proof and simultaneously control the position of each matrix member and means for simultaneously casting a slug containing the impressions of the matrix members so selected and positioned.

24. In a type casting machine, a plurality of matrix mem ers, a mold, means for selecting and positioning the members to form one side of the mold, a typewriter and a working connect-ion between it and the selecting means whereby when the typewriter keys are depressed the typewriter will write proof and simultaneously control the selection or the matrix members, means for moving the matrix members, limiting their movement by the selecting mechanism and at one operation fiasting a single slug from all the matrlx memers.

25. In a type casting machine, a plurality of matrix members, a mold, means for selecting and positioning the members to form one side of the mold, a typewriter and a working connection between it and the selecting means whereby when the typewriterkeys are depressed the typewriter will wr te proof and simultaneously control the posltion of each matrix member, means for moving the matrix members, limiting their movement by the selecting mechanism and at one operat on casting a single slug from all the matrix members.

26::In a type casting machine, a plurality of'matrix members, a mold, means fer selecting and positioning the members to form one side of the'mold, a typewriter and a working connection between it and the selecting means whereby when the typewriterkeys are depressed the typewriter will Wl'ltePI'OOf and simultaneously control the selection of the matrix members, means for movlng the matrix members, limiting their movement by the selecting mechanism and at one operation casting a single slug from all the matrix members, the selecting means being adapted to operate for the selection of a successive arrangement of matrix means during the time that the casting is taking place.

27. In a type casting machine, a plurality of matrix members, a mold, means for selecting and positioning the members to form one side of the mold, a typewriter and a working connection between it and the selecting means whereby when the typewriter keys are depressed the typewriter will write proof and simultaneously control the position of each matrix member, means for moving the matrix members, limiting their movement by the selecting mechanism and at one operation cast ing a single slug from all matrix members, the selecting means being adapted to operate for the selection of a successive arrangement of matrix members during the time that the casting is taking place.

28. In a type casting machine, a plurality of matrix members, a mold, means for selecting and positioning the members to form one side of the mold, a typewriter and a working connection between it and the selecting means whereby when the typewriter keys are depressed the typewriter will write proof and simultaneously control the selection of the matrix members, means for moving the matrix members, limiting their. movement by the selecting mechanism and at one operation casting a single slug from all the matrix members, the selecting means being adapted to operate for'the selection of a successive arrangement of matrix means during the time that the casting is taking place, and means for distributingthe matrix members after 30. In a type casting machine, atypewriter,

a plurality of movable matrix elements, a mold, means for presenting selected charac- -ters on said elements into register with the mold, means controlled by the typewriter for selecting said characters and means for simultaneously casting from the matrix members so selected and positioned.

31. In a type casting machine, a mold, a plurality of matrix elements having characters thereon, a typewriter, means responsive to the actuation of the'typewriter for presenting selected characters into register with the mold and means for simultaneously'castingfrom the matrix members so selected and positioned.

32. In a type selecting machine, a typewriter unit, a key extension engaged by each typewriter key, guide means therefor and a type selecting mechanism controlled thereby, the key extensions being adapted to re main in working relation with the balance of the mechanism when the typewriter unit is removed.

33. In a type selecting machine, a type writer unit, a key extension engaged by each typewriter key, guide means therefor, including the typewriter comb plate.

34. In a type selecting machine, a typewriter unit, a ey extension engaged by each typewriter key, guide means therefor including a guide plate carried by the machine frame.

35. In a type selecting machine, a typewriter unit, a ey extension engaged by each typewriter key, guide means therefor comprising the typewriter comb plate and a guide plate mounted on the machine frame.

36. In a type s'electingmachine, a. typewriter unit, a ey extensionengaged by each typewriter key, a lever upon which the key extension is pivoted, a type selecting mechanism and a connection between it and the lever.

37. In a type selecting machine, a typewriter unit, a key extension engaged by each typewriter key, a lever upon which the key extension is pivoted, a type selecting mechanism and a connection between it and the writer unit, a

lever, and guide means for the key extension removed from the lever.

38. In a ty selecting machine, a typewriter unit, a ey extension engaged by each typewriter key, a lever u on which the key extension is pivoted, a p urality of pivoted shutters and a connection between each of them and one of the levers.

39. In a type selecting machine, a typewriter unit, a ey extension enga ed by each typewriter key, a lever upon which the key extension is pivoted, a plurality of pivoted shutters and a connection between each of them and one of the levers, and yielding means for returning each shutter to its orig1- nal position after the pressure on the key has been released. 40. In a type selecting machine, a typeey extension engaged by each typewriter key, a lever upon whlch the key extension is pivoted, a plurality of pivoted shutters and a connection between each of them and one of the levers comprising ears on the shutters and a tension member interposed between each ear and a lever.

41. The combination with a typewriter having a plurality of keys, and a plurality of character elements, each key controlling a plurality'of said characters, of a matrix havmg thereon the characters of said keyboard, the characters controlled by each key being positioned adjacently on said matrix, a charactercontrolled by one of said ke a being omitted from the matrix, the other e aracter controlled by said key being positioned at one end of the matrix.

' 42. The combination with a typewriter having-a plurality of keys, and a plurality of character elements, each key controlling a plurality of said characters, of a matrix hav- 4 mg thereon the characters of said keyboard,

the characters controlled by each key being positioned adjacently on, said matrix, the

characters inapplicable to typecasting being omitted from said matrix..

43. The combination with a typewriter having a plurality of keys,an d a plurality of character elements, each key controlling a plurality of said characters, of a matrix havmg thereon the characters of said keyboard, the characters controlled by each key being positioned adjacently on said matrix, the

characters inapplicable to t pe casting being 1 omitted from said matrix, t e characters con-l trolled by keys controlling said omitted characters being positioned adjacent the ends of the matrix.

matrices.

tioned by the stops, each such matrix bar aving formed thereon, in longitudinal alignment, a plurality of intaglio impressions corresponding to the characters appearin on the keyboard, the characters controlle by each key being adjacently sitioned on the bars, means for moving sai matrix bars into position in relation to said stops, and means or positioning type forming material against the matrices.

Signed at Chicago, county of Cook" and State of Illinois, this 17th day of A ril, 1925.

CHESTER A. MA OM10.

itioning type formmechanism, a key- 

